includes/api/ApiQueryInfo.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on Sep 25, 2006
   6  *
   7  * Copyright © 2006 Yuri Astrakhan <Firstname><Lastname>@gmail.com
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 /**
  28  * A query module to show basic page information.
  29  *
  30  * @ingroup API
  31  */
  32 class ApiQueryInfo extends ApiQueryBase {
  33
  34         private $fld_protection = false, $fld_talkid = false,
  35                 $fld_subjectid = false, $fld_url = false,
  36                 $fld_readable = false, $fld_watched = false,
  37                 $fld_preload = false, $fld_displaytitle = false;
  38
  39         private $params, $titles, $missing, $everything, $pageCounter;
  40
  41         private $pageRestrictions, $pageIsRedir, $pageIsNew, $pageTouched,
  42                 $pageLatest, $pageLength;
  43
  44         private $protections, $watched, $talkids, $subjectids, $displaytitles;
  45
  46         private $tokenFunctions;
  47
  48         public function __construct( $query, $moduleName ) {
  49                 parent::__construct( $query, $moduleName, 'in' );
  50         }
  51
  52         /**
  53          * @param $pageSet ApiPageSet
  54          * @return void
  55          */
  56         public function requestExtraData( $pageSet ) {
  57                 global $wgDisableCounters;
  58
  59                 $pageSet->requestField( 'page_restrictions' );
  60                 $pageSet->requestField( 'page_is_redirect' );
  61                 $pageSet->requestField( 'page_is_new' );
  62                 if ( !$wgDisableCounters ) {
  63                         $pageSet->requestField( 'page_counter' );
  64                 }
  65                 $pageSet->requestField( 'page_touched' );
  66                 $pageSet->requestField( 'page_latest' );
  67                 $pageSet->requestField( 'page_len' );
  68         }
  69
  70         /**
  71          * Get an array mapping token names to their handler functions.
  72          * The prototype for a token function is func($pageid, $title)
  73          * it should return a token or false (permission denied)
  74          * @return array array(tokenname => function)
  75          */
  76         protected function getTokenFunctions() {
  77                 // Don't call the hooks twice
  78                 if ( isset( $this->tokenFunctions ) ) {
  79                         return $this->tokenFunctions;
  80                 }
  81
  82                 // If we're in JSON callback mode, no tokens can be obtained
  83                 if ( !is_null( $this->getMain()->getRequest()->getVal( 'callback' ) ) ) {
  84                         return array();
  85                 }
  86
  87                 $this->tokenFunctions = array(
  88                         'edit' => array( 'ApiQueryInfo', 'getEditToken' ),
  89                         'delete' => array( 'ApiQueryInfo', 'getDeleteToken' ),
  90                         'protect' => array( 'ApiQueryInfo', 'getProtectToken' ),
  91                         'move' => array( 'ApiQueryInfo', 'getMoveToken' ),
  92                         'block' => array( 'ApiQueryInfo', 'getBlockToken' ),
  93                         'unblock' => array( 'ApiQueryInfo', 'getUnblockToken' ),
  94                         'email' => array( 'ApiQueryInfo', 'getEmailToken' ),
  95                         'import' => array( 'ApiQueryInfo', 'getImportToken' ),
  96                         'watch' => array( 'ApiQueryInfo', 'getWatchToken'),
  97                 );
  98                 wfRunHooks( 'APIQueryInfoTokens', array( &$this->tokenFunctions ) );
  99                 return $this->tokenFunctions;
 100         }
 101
 102         public static function getEditToken( $pageid, $title ) {
 103                 // We could check for $title->userCan('edit') here,
 104                 // but that's too expensive for this purpose
 105                 // and would break caching
 106                 global $wgUser;
 107                 if ( !$wgUser->isAllowed( 'edit' ) ) {
 108                         return false;
 109                 }
 110
 111                 // The edit token is always the same, let's exploit that
 112                 static $cachedEditToken = null;
 113                 if ( !is_null( $cachedEditToken ) ) {
 114                         return $cachedEditToken;
 115                 }
 116
 117                 $cachedEditToken = $wgUser->getEditToken();
 118                 return $cachedEditToken;
 119         }
 120
 121         public static function getDeleteToken( $pageid, $title ) {
 122                 global $wgUser;
 123                 if ( !$wgUser->isAllowed( 'delete' ) ) {
 124                         return false;
 125                 }
 126
 127                 static $cachedDeleteToken = null;
 128                 if ( !is_null( $cachedDeleteToken ) ) {
 129                         return $cachedDeleteToken;
 130                 }
 131
 132                 $cachedDeleteToken = $wgUser->getEditToken();
 133                 return $cachedDeleteToken;
 134         }
 135
 136         public static function getProtectToken( $pageid, $title ) {
 137                 global $wgUser;
 138                 if ( !$wgUser->isAllowed( 'protect' ) ) {
 139                         return false;
 140                 }
 141
 142                 static $cachedProtectToken = null;
 143                 if ( !is_null( $cachedProtectToken ) ) {
 144                         return $cachedProtectToken;
 145                 }
 146
 147                 $cachedProtectToken = $wgUser->getEditToken();
 148                 return $cachedProtectToken;
 149         }
 150
 151         public static function getMoveToken( $pageid, $title ) {
 152                 global $wgUser;
 153                 if ( !$wgUser->isAllowed( 'move' ) ) {
 154                         return false;
 155                 }
 156
 157                 static $cachedMoveToken = null;
 158                 if ( !is_null( $cachedMoveToken ) ) {
 159                         return $cachedMoveToken;
 160                 }
 161
 162                 $cachedMoveToken = $wgUser->getEditToken();
 163                 return $cachedMoveToken;
 164         }
 165
 166         public static function getBlockToken( $pageid, $title ) {
 167                 global $wgUser;
 168                 if ( !$wgUser->isAllowed( 'block' ) ) {
 169                         return false;
 170                 }
 171
 172                 static $cachedBlockToken = null;
 173                 if ( !is_null( $cachedBlockToken ) ) {
 174                         return $cachedBlockToken;
 175                 }
 176
 177                 $cachedBlockToken = $wgUser->getEditToken();
 178                 return $cachedBlockToken;
 179         }
 180
 181         public static function getUnblockToken( $pageid, $title ) {
 182                 // Currently, this is exactly the same as the block token
 183                 return self::getBlockToken( $pageid, $title );
 184         }
 185
 186         public static function getEmailToken( $pageid, $title ) {
 187                 global $wgUser;
 188                 if ( !$wgUser->canSendEmail() || $wgUser->isBlockedFromEmailUser() ) {
 189                         return false;
 190                 }
 191
 192                 static $cachedEmailToken = null;
 193                 if ( !is_null( $cachedEmailToken ) ) {
 194                         return $cachedEmailToken;
 195                 }
 196
 197                 $cachedEmailToken = $wgUser->getEditToken();
 198                 return $cachedEmailToken;
 199         }
 200
 201         public static function getImportToken( $pageid, $title ) {
 202                 global $wgUser;
 203                 if ( !$wgUser->isAllowedAny( 'import', 'importupload' ) ) {
 204                         return false;
 205                 }
 206
 207                 static $cachedImportToken = null;
 208                 if ( !is_null( $cachedImportToken ) ) {
 209                         return $cachedImportToken;
 210                 }
 211
 212                 $cachedImportToken = $wgUser->getEditToken();
 213                 return $cachedImportToken;
 214         }
 215
 216         public static function getWatchToken( $pageid, $title ) {
 217                 global $wgUser;
 218                 if ( !$wgUser->isLoggedIn() ) {
 219                         return false;
 220                 }
 221
 222                 static $cachedWatchToken = null;
 223                 if ( !is_null( $cachedWatchToken ) ) {
 224                         return $cachedWatchToken;
 225                 }
 226
 227                 $cachedWatchToken = $wgUser->getEditToken( 'watch' );
 228                 return $cachedWatchToken;
 229         }
 230
 231         public function execute() {
 232                 $this->params = $this->extractRequestParams();
 233                 if ( !is_null( $this->params['prop'] ) ) {
 234                         $prop = array_flip( $this->params['prop'] );
 235                         $this->fld_protection = isset( $prop['protection'] );
 236                         $this->fld_watched = isset( $prop['watched'] );
 237                         $this->fld_talkid = isset( $prop['talkid'] );
 238                         $this->fld_subjectid = isset( $prop['subjectid'] );
 239                         $this->fld_url = isset( $prop['url'] );
 240                         $this->fld_readable = isset( $prop['readable'] );
 241                         $this->fld_preload = isset( $prop['preload'] );
 242                         $this->fld_displaytitle = isset( $prop['displaytitle'] );
 243                 }
 244
 245                 $pageSet = $this->getPageSet();
 246                 $this->titles = $pageSet->getGoodTitles();
 247                 $this->missing = $pageSet->getMissingTitles();
 248                 $this->everything = $this->titles + $this->missing;
 249                 $result = $this->getResult();
 250
 251                 uasort( $this->everything, array( 'Title', 'compare' ) );
 252                 if ( !is_null( $this->params['continue'] ) ) {
 253                         // Throw away any titles we're gonna skip so they don't
 254                         // clutter queries
 255                         $cont = explode( '|', $this->params['continue'] );
 256                         if ( count( $cont ) != 2 ) {
 257                                 $this->dieUsage( 'Invalid continue param. You should pass the original ' .
 258                                                 'value returned by the previous query', '_badcontinue' );
 259                         }
 260                         $conttitle = Title::makeTitleSafe( $cont[0], $cont[1] );
 261                         foreach ( $this->everything as $pageid => $title ) {
 262                                 if ( Title::compare( $title, $conttitle ) >= 0 ) {
 263                                         break;
 264                                 }
 265                                 unset( $this->titles[$pageid] );
 266                                 unset( $this->missing[$pageid] );
 267                                 unset( $this->everything[$pageid] );
 268                         }
 269                 }
 270
 271                 $this->pageRestrictions = $pageSet->getCustomField( 'page_restrictions' );
 272                 $this->pageIsRedir = $pageSet->getCustomField( 'page_is_redirect' );
 273                 $this->pageIsNew = $pageSet->getCustomField( 'page_is_new' );
 274
 275                 global $wgDisableCounters;
 276
 277                 if ( !$wgDisableCounters ) {
 278                         $this->pageCounter = $pageSet->getCustomField( 'page_counter' );
 279                 }
 280                 $this->pageTouched = $pageSet->getCustomField( 'page_touched' );
 281                 $this->pageLatest = $pageSet->getCustomField( 'page_latest' );
 282                 $this->pageLength = $pageSet->getCustomField( 'page_len' );
 283
 284                 // Get protection info if requested
 285                 if ( $this->fld_protection ) {
 286                         $this->getProtectionInfo();
 287                 }
 288
 289                 if ( $this->fld_watched ) {
 290                         $this->getWatchedInfo();
 291                 }
 292
 293                 // Run the talkid/subjectid query if requested
 294                 if ( $this->fld_talkid || $this->fld_subjectid ) {
 295                         $this->getTSIDs();
 296                 }
 297
 298                 if ( $this->fld_displaytitle ) {
 299                         $this->getDisplayTitle();
 300                 }
 301
 302                 foreach ( $this->everything as $pageid => $title ) {
 303                         $pageInfo = $this->extractPageInfo( $pageid, $title );
 304                         $fit = $result->addValue( array(
 305                                 'query',
 306                                 'pages'
 307                         ), $pageid, $pageInfo );
 308                         if ( !$fit ) {
 309                                 $this->setContinueEnumParameter( 'continue',
 310                                                 $title->getNamespace() . '|' .
 311                                                 $title->getText() );
 312                                 break;
 313                         }
 314                 }
 315         }
 316
 317         /**
 318          * Get a result array with information about a title
 319          * @param $pageid int Page ID (negative for missing titles)
 320          * @param $title Title object
 321          * @return array
 322          */
 323         private function extractPageInfo( $pageid, $title ) {
 324                 $pageInfo = array();
 325                 if ( $title->exists() ) {
 326                         global $wgDisableCounters;
 327
 328                         $pageInfo['touched'] = wfTimestamp( TS_ISO_8601, $this->pageTouched[$pageid] );
 329                         $pageInfo['lastrevid'] = intval( $this->pageLatest[$pageid] );
 330                         $pageInfo['counter'] = $wgDisableCounters
 331                                 ? ""
 332                                 : intval( $this->pageCounter[$pageid] );
 333                         $pageInfo['length'] = intval( $this->pageLength[$pageid] );
 334
 335                         if ( $this->pageIsRedir[$pageid] ) {
 336                                 $pageInfo['redirect'] = '';
 337                         }
 338                         if ( $this->pageIsNew[$pageid] ) {
 339                                 $pageInfo['new'] = '';
 340                         }
 341                 }
 342
 343                 if ( !is_null( $this->params['token'] ) ) {
 344                         $tokenFunctions = $this->getTokenFunctions();
 345                         $pageInfo['starttimestamp'] = wfTimestamp( TS_ISO_8601, time() );
 346                         foreach ( $this->params['token'] as $t ) {
 347                                 $val = call_user_func( $tokenFunctions[$t], $pageid, $title );
 348                                 if ( $val === false ) {
 349                                         $this->setWarning( "Action '$t' is not allowed for the current user" );
 350                                 } else {
 351                                         $pageInfo[$t . 'token'] = $val;
 352                                 }
 353                         }
 354                 }
 355
 356                 if ( $this->fld_protection ) {
 357                         $pageInfo['protection'] = array();
 358                         if ( isset( $this->protections[$title->getNamespace()][$title->getDBkey()] ) ) {
 359                                 $pageInfo['protection'] =
 360                                         $this->protections[$title->getNamespace()][$title->getDBkey()];
 361                         }
 362                         $this->getResult()->setIndexedTagName( $pageInfo['protection'], 'pr' );
 363                 }
 364
 365                 if ( $this->fld_watched && isset( $this->watched[$title->getNamespace()][$title->getDBkey()] ) ) {
 366                         $pageInfo['watched'] = '';
 367                 }
 368
 369                 if ( $this->fld_talkid && isset( $this->talkids[$title->getNamespace()][$title->getDBkey()] ) ) {
 370                         $pageInfo['talkid'] = $this->talkids[$title->getNamespace()][$title->getDBkey()];
 371                 }
 372
 373                 if ( $this->fld_subjectid && isset( $this->subjectids[$title->getNamespace()][$title->getDBkey()] ) ) {
 374                         $pageInfo['subjectid'] = $this->subjectids[$title->getNamespace()][$title->getDBkey()];
 375                 }
 376
 377                 if ( $this->fld_url ) {
 378                         $pageInfo['fullurl'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 379                         $pageInfo['editurl'] = wfExpandUrl( $title->getFullURL( 'action=edit' ), PROTO_CURRENT );
 380                 }
 381                 if ( $this->fld_readable && $title->userCan( 'read' ) ) {
 382                         $pageInfo['readable'] = '';
 383                 }
 384
 385                 if ( $this->fld_preload ) {
 386                         if ( $title->exists() ) {
 387                                 $pageInfo['preload'] = '';
 388                         } else {
 389                                 $text = null;
 390                                 wfRunHooks( 'EditFormPreloadText', array( &$text, &$title ) );
 391
 392                                 $pageInfo['preload'] = $text;
 393                         }
 394                 }
 395
 396                 if ( $this->fld_displaytitle ) {
 397                         if ( isset( $this->displaytitles[$title->getArticleID()] ) ) {
 398                                 $pageInfo['displaytitle'] = $this->displaytitles[$title->getArticleID()];
 399                         } else {
 400                                 $pageInfo['displaytitle'] = $title->getPrefixedText();
 401                         }
 402                 }
 403
 404                 return $pageInfo;
 405         }
 406
 407         /**
 408          * Get information about protections and put it in $protections
 409          */
 410         private function getProtectionInfo() {
 411                 global $wgContLang;
 412                 $this->protections = array();
 413                 $db = $this->getDB();
 414
 415                 // Get normal protections for existing titles
 416                 if ( count( $this->titles ) ) {
 417                         $this->resetQueryParams();
 418                         $this->addTables( array( 'page_restrictions', 'page' ) );
 419                         $this->addWhere( 'page_id=pr_page' );
 420                         $this->addFields( array( 'pr_page', 'pr_type', 'pr_level',
 421                                         'pr_expiry', 'pr_cascade', 'page_namespace',
 422                                         'page_title' ) );
 423                         $this->addWhereFld( 'pr_page', array_keys( $this->titles ) );
 424
 425                         $res = $this->select( __METHOD__ );
 426                         foreach ( $res as $row ) {
 427                                 $a = array(
 428                                         'type' => $row->pr_type,
 429                                         'level' => $row->pr_level,
 430                                         'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 )
 431                                 );
 432                                 if ( $row->pr_cascade ) {
 433                                         $a['cascade'] = '';
 434                                 }
 435                                 $this->protections[$row->page_namespace][$row->page_title][] = $a;
 436
 437                                 // Also check old restrictions
 438                                 if ( $this->pageRestrictions[$row->pr_page] ) {
 439                                         $restrictions = explode( ':', trim( $this->pageRestrictions[$row->pr_page] ) );
 440                                         foreach ( $restrictions as $restrict ) {
 441                                                 $temp = explode( '=', trim( $restrict ) );
 442                                                 if ( count( $temp ) == 1 ) {
 443                                                         // old old format should be treated as edit/move restriction
 444                                                         $restriction = trim( $temp[0] );
 445
 446                                                         if ( $restriction == '' ) {
 447                                                                 continue;
 448                                                         }
 449                                                         $this->protections[$row->page_namespace][$row->page_title][] = array(
 450                                                                 'type' => 'edit',
 451                                                                 'level' => $restriction,
 452                                                                 'expiry' => 'infinity',
 453                                                         );
 454                                                         $this->protections[$row->page_namespace][$row->page_title][] = array(
 455                                                                 'type' => 'move',
 456                                                                 'level' => $restriction,
 457                                                                 'expiry' => 'infinity',
 458                                                         );
 459                                                 } else {
 460                                                         $restriction = trim( $temp[1] );
 461                                                         if ( $restriction == '' ) {
 462                                                                 continue;
 463                                                         }
 464                                                         $this->protections[$row->page_namespace][$row->page_title][] = array(
 465                                                                 'type' => $temp[0],
 466                                                                 'level' => $restriction,
 467                                                                 'expiry' => 'infinity',
 468                                                         );
 469                                                 }
 470                                         }
 471                                 }
 472                         }
 473                 }
 474
 475                 // Get protections for missing titles
 476                 if ( count( $this->missing ) ) {
 477                         $this->resetQueryParams();
 478                         $lb = new LinkBatch( $this->missing );
 479                         $this->addTables( 'protected_titles' );
 480                         $this->addFields( array( 'pt_title', 'pt_namespace', 'pt_create_perm', 'pt_expiry' ) );
 481                         $this->addWhere( $lb->constructSet( 'pt', $db ) );
 482                         $res = $this->select( __METHOD__ );
 483                         foreach ( $res as $row ) {
 484                                 $this->protections[$row->pt_namespace][$row->pt_title][] = array(
 485                                         'type' => 'create',
 486                                         'level' => $row->pt_create_perm,
 487                                         'expiry' => $wgContLang->formatExpiry( $row->pt_expiry, TS_ISO_8601 )
 488                                 );
 489                         }
 490                 }
 491
 492                 // Cascading protections
 493                 $images = $others = array();
 494                 foreach ( $this->everything as $title ) {
 495                         if ( $title->getNamespace() == NS_FILE ) {
 496                                 $images[] = $title->getDBkey();
 497                         } else {
 498                                 $others[] = $title;
 499                         }
 500                 }
 501
 502                 if ( count( $others ) ) {
 503                         // Non-images: check templatelinks
 504                         $lb = new LinkBatch( $others );
 505                         $this->resetQueryParams();
 506                         $this->addTables( array( 'page_restrictions', 'page', 'templatelinks' ) );
 507                         $this->addFields( array( 'pr_type', 'pr_level', 'pr_expiry',
 508                                         'page_title', 'page_namespace',
 509                                         'tl_title', 'tl_namespace' ) );
 510                         $this->addWhere( $lb->constructSet( 'tl', $db ) );
 511                         $this->addWhere( 'pr_page = page_id' );
 512                         $this->addWhere( 'pr_page = tl_from' );
 513                         $this->addWhereFld( 'pr_cascade', 1 );
 514
 515                         $res = $this->select( __METHOD__ );
 516                         foreach ( $res as $row ) {
 517                                 $source = Title::makeTitle( $row->page_namespace, $row->page_title );
 518                                 $this->protections[$row->tl_namespace][$row->tl_title][] = array(
 519                                         'type' => $row->pr_type,
 520                                         'level' => $row->pr_level,
 521                                         'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 ),
 522                                         'source' => $source->getPrefixedText()
 523                                 );
 524                         }
 525                 }
 526
 527                 if ( count( $images ) ) {
 528                         // Images: check imagelinks
 529                         $this->resetQueryParams();
 530                         $this->addTables( array( 'page_restrictions', 'page', 'imagelinks' ) );
 531                         $this->addFields( array( 'pr_type', 'pr_level', 'pr_expiry',
 532                                         'page_title', 'page_namespace', 'il_to' ) );
 533                         $this->addWhere( 'pr_page = page_id' );
 534                         $this->addWhere( 'pr_page = il_from' );
 535                         $this->addWhereFld( 'pr_cascade', 1 );
 536                         $this->addWhereFld( 'il_to', $images );
 537
 538                         $res = $this->select( __METHOD__ );
 539                         foreach ( $res as $row ) {
 540                                 $source = Title::makeTitle( $row->page_namespace, $row->page_title );
 541                                 $this->protections[NS_FILE][$row->il_to][] = array(
 542                                         'type' => $row->pr_type,
 543                                         'level' => $row->pr_level,
 544                                         'expiry' => $wgContLang->formatExpiry( $row->pr_expiry, TS_ISO_8601 ),
 545                                         'source' => $source->getPrefixedText()
 546                                 );
 547                         }
 548                 }
 549         }
 550
 551         /**
 552          * Get talk page IDs (if requested) and subject page IDs (if requested)
 553          * and put them in $talkids and $subjectids
 554          */
 555         private function getTSIDs() {
 556                 $getTitles = $this->talkids = $this->subjectids = array();
 557
 558                 foreach ( $this->everything as $t ) {
 559                         if ( MWNamespace::isTalk( $t->getNamespace() ) ) {
 560                                 if ( $this->fld_subjectid ) {
 561                                         $getTitles[] = $t->getSubjectPage();
 562                                 }
 563                         } elseif ( $this->fld_talkid ) {
 564                                 $getTitles[] = $t->getTalkPage();
 565                         }
 566                 }
 567                 if ( !count( $getTitles ) ) {
 568                         return;
 569                 }
 570
 571                 $db = $this->getDB();
 572
 573                 // Construct a custom WHERE clause that matches
 574                 // all titles in $getTitles
 575                 $lb = new LinkBatch( $getTitles );
 576                 $this->resetQueryParams();
 577                 $this->addTables( 'page' );
 578                 $this->addFields( array( 'page_title', 'page_namespace', 'page_id' ) );
 579                 $this->addWhere( $lb->constructSet( 'page', $db ) );
 580                 $res = $this->select( __METHOD__ );
 581                 foreach ( $res as $row ) {
 582                         if ( MWNamespace::isTalk( $row->page_namespace ) ) {
 583                                 $this->talkids[MWNamespace::getSubject( $row->page_namespace )][$row->page_title] =
 584                                                 intval( $row->page_id );
 585                         } else {
 586                                 $this->subjectids[MWNamespace::getTalk( $row->page_namespace )][$row->page_title] =
 587                                                 intval( $row->page_id );
 588                         }
 589                 }
 590         }
 591
 592         private function getDisplayTitle() {
 593                 $this->displaytitles = array();
 594
 595                 $pageIds = array_keys( $this->titles );
 596
 597                 if ( !count( $pageIds ) ) {
 598                         return;
 599                 }
 600
 601                 $this->resetQueryParams();
 602                 $this->addTables( 'page_props' );
 603                 $this->addFields( array( 'pp_page', 'pp_value' ) );
 604                 $this->addWhereFld( 'pp_page', $pageIds );
 605                 $this->addWhereFld( 'pp_propname', 'displaytitle' );
 606                 $res = $this->select( __METHOD__ );
 607
 608                 foreach ( $res as $row ) {
 609                         $this->displaytitles[$row->pp_page] = $row->pp_value;
 610                 }
 611         }
 612
 613         /**
 614          * Get information about watched status and put it in $this->watched
 615          */
 616         private function getWatchedInfo() {
 617                 $user = $this->getUser();
 618
 619                 if ( $user->isAnon() || count( $this->everything ) == 0 ) {
 620                         return;
 621                 }
 622
 623                 $this->watched = array();
 624                 $db = $this->getDB();
 625
 626                 $lb = new LinkBatch( $this->everything );
 627
 628                 $this->resetQueryParams();
 629                 $this->addTables( array( 'watchlist' ) );
 630                 $this->addFields( array( 'wl_title', 'wl_namespace' ) );
 631                 $this->addWhere( array(
 632                         $lb->constructSet( 'wl', $db ),
 633                         'wl_user' => $user->getID()
 634                 ) );
 635
 636                 $res = $this->select( __METHOD__ );
 637
 638                 foreach ( $res as $row ) {
 639                         $this->watched[$row->wl_namespace][$row->wl_title] = true;
 640                 }
 641         }
 642
 643         public function getCacheMode( $params ) {
 644                 $publicProps = array(
 645                         'protection',
 646                         'talkid',
 647                         'subjectid',
 648                         'url',
 649                         'preload',
 650                         'displaytitle',
 651                 );
 652                 if ( !is_null( $params['prop'] ) ) {
 653                         foreach ( $params['prop'] as $prop ) {
 654                                 if ( !in_array( $prop, $publicProps ) ) {
 655                                         return 'private';
 656                                 }
 657                         }
 658                 }
 659                 if ( !is_null( $params['token'] ) ) {
 660                         return 'private';
 661                 }
 662                 return 'public';
 663         }
 664
 665         public function getAllowedParams() {
 666                 return array(
 667                         'prop' => array(
 668                                 ApiBase::PARAM_DFLT => null,
 669                                 ApiBase::PARAM_ISMULTI => true,
 670                                 ApiBase::PARAM_TYPE => array(
 671                                         'protection',
 672                                         'talkid',
 673                                         'watched', # private
 674                                         'subjectid',
 675                                         'url',
 676                                         'readable', # private
 677                                         'preload',
 678                                         'displaytitle',
 679                                         // If you add more properties here, please consider whether they
 680                                         // need to be added to getCacheMode()
 681                                 ) ),
 682                         'token' => array(
 683                                 ApiBase::PARAM_DFLT => null,
 684                                 ApiBase::PARAM_ISMULTI => true,
 685                                 ApiBase::PARAM_TYPE => array_keys( $this->getTokenFunctions() )
 686                         ),
 687                         'continue' => null,
 688                 );
 689         }
 690
 691         public function getParamDescription() {
 692                 return array(
 693                         'prop' => array(
 694                                 'Which additional properties to get:',
 695                                 ' protection   - List the protection level of each page',
 696                                 ' talkid       - The page ID of the talk page for each non-talk page',
 697                                 ' watched      - List the watched status of each page',
 698                                 ' subjectid    - The page ID of the parent page for each talk page',
 699                                 ' url          - Gives a full URL to the page, and also an edit URL',
 700                                 ' readable     - Whether the user can read this page',
 701                                 ' preload      - Gives the text returned by EditFormPreloadText',
 702                                 ' displaytitle - Gives the way the page title is actually displayed',
 703                         ),
 704                         'token' => 'Request a token to perform a data-modifying action on a page',
 705                         'continue' => 'When more results are available, use this to continue',
 706                 );
 707         }
 708
 709         public function getDescription() {
 710                 return 'Get basic page information such as namespace, title, last touched date, ...';
 711         }
 712
 713         public function getPossibleErrors() {
 714                 return array_merge( parent::getPossibleErrors(), array(
 715                         array( 'code' => '_badcontinue', 'info' => 'Invalid continue param. You should pass the original value returned by the previous query' ),
 716                 ) );
 717         }
 718
 719         public function getExamples() {
 720                 return array(
 721                         'api.php?action=query&prop=info&titles=Main%20Page',
 722                         'api.php?action=query&prop=info&inprop=protection&titles=Main%20Page'
 723                 );
 724         }
 725
 726         public function getHelpUrls() {
 727                 return 'https://www.mediawiki.org/wiki/API:Properties#info_.2F_in';
 728         }
 729
 730         public function getVersion() {
 731                 return __CLASS__ . ': $Id$';
 732         }
 733 }